Based on the detail you've provided, it seems one problem you're facing is access to industry domain experts who can both validate what you're doing and also perhaps help you refine the product and market access.
If that is correct, I'd suggest that you don't, at this point, look for a non-technical co-founder but rather just approach people with domain expertise in the industry that you're trying to target for advice and validation by requesting a short conversation. LinkedIn can be a very good source and depending on how you approach the people and your own profile you may get a very good response from people. Anywhere above 20-30% response rate would be very good just to set expectations, it can be higher or lower but don't be disheartened.
Depending on the domain you're targeting there is a much much larger pool of people who will offer you initial advice than who will be willing to join as co-founder. Once you get connected and they accept, just talk to these people. Get input, and also ask for further connections, as in is there someone you should be speaking to that they can introduce you to. Use them in future when you're looking to make a sale or for early adoption and again, for advice.
This will kick start your journey and you will find people. If you find someone truly awesome and nice, who is also interested in what you're doing, you can ask them to be an advisor. If you find someone who is interested in joining, then perhaps have them join. But be careful, and make diligent decision before having people join the team.